[R] lme4 problem: model defining and effect estimation ------ question from new bird to R community from SAS community

[peter dalgaard]

On Apr 16, 2011, at 09:52 , Dieter Menne wrote:

>> 
> 
> Thanks for providing a self-contained example. The error message is really a
> bit confusing (anybody around who understands what lme thinks here?), 

It's not thinking at all, it's just evaluating a:b (so usual model formula interpretation is partially disabled? Hm, well, multiplying the two continuous variables wouldn't make sense either, I suppose.) and what you see is a variant of

> (1:2):(1:2)
[1] 1
Warning messages:
1: In (1:2):(1:2) :
  numerical expression has 2 elements: only the first used
2: In (1:2):(1:2) :
  numerical expression has 2 elements: only the first used


-- 
Peter Dalgaard
Center for Statistics, Copenhagen Business School
Solbjerg Plads 3, 2000 Frederiksberg, Denmark
Phone: (+45)38153501
Email: pd.mes at cbs.dk  Priv: PDalgd at gmail.com